CN105822613A - Integrated valve block based on load feedback control and system based on load feedback control - Google Patents
Integrated valve block based on load feedback control and system based on load feedback control Download PDFInfo
- Publication number
- CN105822613A CN105822613A CN201610360042.5A CN201610360042A CN105822613A CN 105822613 A CN105822613 A CN 105822613A CN 201610360042 A CN201610360042 A CN 201610360042A CN 105822613 A CN105822613 A CN 105822613A
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- Prior art keywords
- valve
- mouth
- module
- valve block
- integrated
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
Abstract
The invention discloses an integrated valve block based on load feedback control and a system based on load feedback control. An integrated valve comprises a prefill valve module, a pilot oil source module, a radiating electricity proportion control module, a radiating compensation valve module and an LS feedback module. One integrated valve block is used for controlling a brake system, a radiating system and a pilot system. The invention further discloses a system provided with the integrated valve block and based on load feedback control. The system comprises a hydraulic oil tank, a variable pump, the integrated valve block, a pilot energy accumulator, a brake energy accumulator, a brake module, a radiating module and a pilot module, wherein LS load feedback control is adopted by the variable pump, and LS signals are derived from the brake system and the radiating system. A valve block of the brake system, a valve block of the radiating system and a valve block of the pilot system are integrated into one valve block, the system is greatly simplified, the cost is reduced, the assembly space is saved, and pipelines are simplified. Compared with other fixed displacement pump systems, the energy consumption of the variable pump system with LS load sensitive feedback control can be greatly lowered.
Description
Technical field
The present invention relates to a kind of construction machinery hydraulic system, a kind of integrated valve block controlled based on load feedback and system.
Background technology
Hydraulic system act as by change pressure increase active force, act on huge in engineering machine.In current construction machinery hydraulic system, brakes, cooling system, pilot system are essentially all and are controlled by each independent valve block.This is accomplished by three valve blocks and three cover systems, produces a series of drawback, as system is the most complicated, takes up room big, high cost etc..If can be by three integrated valve blocks of valve block, while system is simplified, cost also can be substantially reduced.
Summary of the invention
The problem existed for above-mentioned prior art, the present invention provides a kind of integrated valve block controlled based on load feedback and system, and brakes, cooling system, the integrated valve block of valve block of pilot system these three system, system is simplified, and is substantially reduced cost.
To achieve these goals, the technical solution used in the present invention is: a kind of integrated valve block controlled based on load feedback, including replenishing valve module, pilot control module, heat radiation electric proportional control module, heat radiation recuperation valve module and LS feedback module；Described replenishing valve module includes replenishing valve block d, check valve b and throttle orifice c；The P1 mouth connecting joint discharge orifice c of replenishing valve block d, oil is taken from P mouth again through check valve b, replenishing valve block d spool left end pressure takes from throttle orifice c outlet, and right-hand member spring cavity connects overflow valve e, and replenishing valve block P1 mouth connects brake accumulator and brake module respectively through A mouth and the C mouth of integrated valve block 4；Described pilot control module includes the overflow valve f and check valve g that reduces pressure；Decompression overflow valve f takes oil through check valve g from P mouth, and check valve g outlet connects adjustable pollution discharge pipe device and first guide module through B mouth and the E mouth of integrated valve block 4；Described heat radiation electric proportional control module includes that the electric proportional reversing valve h of a two-position three way, electricity proportional reversing valve h are connected with P mouth, T mouth and the shuttle valve k of integrated valve block 4 respectively；Described heat radiation recuperation valve module is composed in parallel by throttle orifice i and outer controlled overflow valve j, is connected with P mouth and the D mouth of integrated valve block；D mouth is connected to radiating module, and outer controlled overflow valve j controls mouth and is connected with the A1 mouth of replenishing valve block d；Described LS feedback module includes a shuttle valve k；A1 mouth and the electricity proportional reversing valve h outlet of shuttle valve k and replenishing valve block d are connected, and shuttle valve k outlet is connected with variable pump through the LS mouth of integrated valve block 4.
The present invention is further, also includes that main safety valve a, described main safety valve a are connected with P mouth and the T mouth of integrated valve block.To set the safe pressure of whole system.
The present invention is further, and replenishing valve block d uses two position and four-way reversing valves, y-function, built-in fixed orifice.
Compared with prior art, the present invention, brakes, cooling system, the integrated valve block of valve block of pilot system these three system, this greatly simplifies system.The integrated cost that can be substantially reduced of valve block also saves assembly space simultaneously, simplifies pipeline.Use variable pump systems LS load-sensitive feedback control also can be substantially reduced energy consumption compared to other Constant Pump System.
The present invention also provides for a kind of system controlled based on load feedback being provided with above-mentioned integrated valve block, and this system includes hydraulic oil container, variable pump, integrated valve block, adjustable pollution discharge pipe device, brake accumulator, brake module, radiating module and first guide module；Described variable pump oil-in is connected with hydraulic oil container, unloading port is connected to hydraulic oil container, the P mouth of integrated valve block is connected with the oil-out of variable pump, LS mouth is connected with the LS mouth of variable pump, A mouth is connected with brake accumulator, and B mouth is connected with adjustable pollution discharge pipe device, and C mouth connects brake module, D mouth connects radiating module, and E mouth connects first guide module.Owing to above-mentioned integrated valve block has above-mentioned technique effect, therefore, it is provided with this system controlled based on load feedback and also should possess corresponding technique effect.
The present invention is further, and described variable pump uses LS load feedback to control, and LS signal takes from brakes and cooling system.
The present invention is further, and described integrated valve block T mouth connects filter.
The present invention is further, and described brake module includes foot valve and brake.
The present invention is further, and described radiating module includes fan motor, switching valve.
The present invention is further, and first guide module includes that pilot valve and pilot valve are to main distributing valve guide's oil circuit.
Accompanying drawing explanation
Fig. 1 is the hydraulic scheme of the present invention；
Fig. 2 is integrated valve block schematic diagram of the present invention.
In figure: 1, hydraulic oil container, 2, variable pump, 3, filter, 4, integrated valve block, 5, adjustable pollution discharge pipe device, 6, brake accumulator, 7, brake module, 8, radiating module, 9, first guide module.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As depicted in figs. 1 and 2, a kind of integrated valve block controlled based on load feedback of the present invention, including replenishing valve module, pilot control module, heat radiation electric proportional control module, heat radiation recuperation valve module, LS feedback module and main safety valve；Replenishing valve module includes replenishing valve block d, check valve b and throttle orifice c；The P1 mouth connecting joint discharge orifice c of replenishing valve block d, oil is taken from P mouth again through check valve b, replenishing valve block d spool left end pressure takes from throttle orifice c outlet, and right-hand member spring cavity connects overflow valve e, and replenishing valve block P1 mouth connects brake accumulator 6 and brake module 7 respectively through A mouth and the C mouth of integrated valve block 4；Pilot control module includes the overflow valve f and check valve g that reduces pressure；Decompression overflow valve f takes oil through check valve g from P mouth, and check valve g outlet connects adjustable pollution discharge pipe device 5 and first guide module 9 through B mouth and the E mouth of integrated valve block 4；Heat radiation electric proportional control module includes that the electric proportional reversing valve h of a two-position three way, electricity proportional reversing valve h are connected with P mouth, T mouth and the shuttle valve k of integrated valve block 4 respectively；Electric magnet signal is sent control instruction by controller according to the temperature of each medium so that fan motor is at rational rotating speed；Heat radiation recuperation valve module is composed in parallel by throttle orifice i and outer controlled overflow valve j, is connected with P mouth and the D mouth of integrated valve block 4；D mouth is connected to radiating module, and outer controlled overflow valve j controls mouth and is connected with the A1 mouth of replenishing valve block d；LS feedback module includes a shuttle valve k；A1 mouth and the electricity proportional reversing valve h outlet of shuttle valve k and replenishing valve block d are connected, and shuttle valve k outlet is connected with variable pump 2 through the LS mouth of integrated valve block 4；Main safety valve a, main safety valve a are connected with P mouth and the T mouth of integrated valve block 4.
On the basis of foregoing, the present invention provides the embodiment of a kind of replenishing valve block d, uses two position and four-way reversing valves, y-function, built-in fixed orifice.
As it is shown in figure 1, the present invention also provides for a kind of system controlled based on load feedback being provided with above-mentioned integrated valve block, including hydraulic oil container 1, variable pump 2, integrated valve block 4 adjustable pollution discharge pipe device 5, brake accumulator 6, brake module 7, radiating module 8 and first guide module 9；State variable pump 2 oil-in to be connected with hydraulic oil container 1, unloading port is connected to hydraulic oil container 1, the P mouth of integrated valve block 4 is connected with the oil-out of variable pump 2, LS mouth is connected with the LS mouth of variable pump 2, A mouth is connected with brake accumulator 6, and B mouth is connected with adjustable pollution discharge pipe device 5, and C mouth connects brake module 7, D mouth connects radiating module 8, and E mouth connects first guide module 9.Wherein, brake module 7 includes that brake portion is implemented in foot valve and brake etc., radiating module 8 includes the heat sinking function part such as fan motor, switching valve, first guide module 9 includes that pilot valve and pilot valve are to main distributing valve guide's oil circuit etc., owing to above-mentioned functions module is prior art content, do not describing in detail.
Variable pump 2 of the present invention uses LS load feedback to control, and LS signal takes from brakes and cooling system.Also energy consumption can be substantially reduced compared to other Constant Pump System.
The present invention connects at integrated valve block 4T mouth filter 3.The effect of hydraulic filter is to filter in hydraulic system various impurity occur, prevents foreign matter from entering hydraulic system.
Present system operation principle is as follows:
Brakes: brake accumulator 6 gives brake module 7 fuel feeding, oil pressure is introduced brake by foot valve and realizes braking by brake module 7.The bound pressure of replenishing valve module settings topping up, spring sets pressure correspondence threshold pression, and overflow valve e sets pressure correspondence bound pressure reduction.Change row's principle of work process and variable pump 2 is as described below: the first stage, several times after braking, when brake accumulator 6 pressure sets pressure less than spring, replenishing valve block d switches to right position topping up, now the P1 mouth of replenishing valve block d communicates with brake accumulator 6 pressure, B1 mouth communicates with spring cavity, and A1 mouth pressure feeds back to variable pump 2 through shuttle valve k, and regulated variable pump 2 is larger displacement；Second stage, carrying out along with filling process, brake accumulator 6 pressure is gradually increased, the B1 mouth pressure of replenishing valve block d makes overflow valve e open, B1 mouth pressure is that overflow valve e sets pressure, during until the pressure of brake accumulator 6 sets pressure and overflow valve e setting pressure sum more than spring, replenishing valve block d spool commutates, switch to the work of left position, now the A1 mouth of replenishing valve block d communicates with T mouth through fixed orifice, A1 mouth pressure feeds back to variable pump 2 through shuttle valve k, regulated variable pump 2 is smaller displacement, the B1 mouth connection spring cavity of replenishing valve block d and T mouth, spring cavity pressure release, overflow valve e closes；Phase III, the left position of replenishing valve block d works, and spring cavity is in pressure release state, spool two ends brake accumulator 6 pressure sets pressure with spring and compares, during until the pressure of brake accumulator 6 sets pressure again below spring, replenishing valve block d switches to again right position topping up, and variable pump 2 becomes huge discharge.
Pilot system: the decompressed pressure setting value of decompression overflow valve f is pilot system pressure, oil pressure relief setting value is more than decompressed pressure setting value, and decompression overflow valve f takes oil from P mouth, connects adjustable pollution discharge pipe device 5 through check valve g.Work process is as follows: when adjustable pollution discharge pipe device 5 pressure sets decompressed pressure less than decompression overflow valve f, fluid enters adjustable pollution discharge pipe device 5 through decompression overflow valve f, during until adjustable pollution discharge pipe device 5 pressure is less than the decompressed pressure setting value of decompression overflow valve f, decompression overflow valve f valve port is closed, and adjustable pollution discharge pipe device 5 topping up terminates.Oil pressure is acted on main valve two ends by the pilot valve of first guide module 9 by adjustable pollution discharge pipe device 5 inner fluid, thus realizes each action.After perseveration, when adjustable pollution discharge pipe device 5 pressure sets decompressed pressure less than decompression overflow valve f again, adjustable pollution discharge pipe device 5 topping up again.
Cooling system: the electric magnet signal of electricity proportional reversing valve h is sent control instruction by controller according to the temperature of each medium, passing ratio electric magnet signal controls the aperture of electricity proportional reversing valve h, regulation electricity proportional reversing valve h outlet oil pressure, and feed back to variable pump 2 as LS signal, the discharge capacity of regulated variable pump 2, regulation enters the flow of radiating module fan motor as required.Throttle orifice i and outer controlled overflow valve j is connected in parallel to radiating module, outer controlled overflow valve j control signal takes from the A1 mouth of replenishing valve block d, during topping up, A1 mouth communicates with brake accumulator 6 pressure, during topping up, A1 mouth does not communicates with tank pressure, so outer controlled overflow valve j obstructed oil during topping up, only from throttle orifice i fuel feeding to radiating module, during topping up, outer controlled overflow valve j does not opens, from outer controlled overflow valve and throttle orifice i fuel feeding to radiating module, ensure major part flow supply replenishing valve module during topping up, it is achieved that the function of preferential topping up.
Variable pump control system: use LS load-sensitive feedback control, LS signal takes from replenishing valve module and heat radiation electric proportional control module.During replenishing valve module topping up, LS signal takes from energy storage pressure, not LS signal communication oil return opening during topping up；Heat radiation electric proportional control module LS signal takes from electricity proportional reversing valve h outlet oil pressure, and the aperture of valve port is adjusted as required by proportion electro-magnet.Shuttle valve k compares this two-way pressure signal, and higher value feeds back to variable pump 2, it is achieved Variable Control.
Certainly, above-described embodiment is only the preferred version of the present invention, is specifically not limited thereto, and can make having adjusting targetedly on this basis according to actual needs, thus obtain different embodiments.Owing to mode in the cards is more, illustrate the most one by one.
Claims (9)
1. the integrated valve block controlled based on load feedback, it is characterised in that include replenishing valve module, pilot control module, heat radiation electric proportional control module, heat radiation recuperation valve module and LS feedback module；
Described replenishing valve module includes replenishing valve block d, check valve b and throttle orifice c；The P1 mouth connecting joint discharge orifice c of replenishing valve block d, oil is taken from P mouth again through check valve b, replenishing valve block d spool left end pressure takes from throttle orifice c outlet, right-hand member spring cavity connects overflow valve e, and replenishing valve block P1 mouth connects brake accumulator (6) and brake module (7) respectively through A mouth and the C mouth of integrated valve block 4；
Described pilot control module includes the overflow valve f and check valve g that reduces pressure；Decompression overflow valve f takes oil through check valve g from P mouth, and check valve g outlet connects adjustable pollution discharge pipe device (5) and first guide module (9) through B mouth and the E mouth of integrated valve block 4；
Described heat radiation electric proportional control module includes that the electric proportional reversing valve h of a two-position three way, electricity proportional reversing valve h are connected with P mouth, T mouth and the shuttle valve k of integrated valve block 4 respectively；
Described heat radiation recuperation valve module is composed in parallel by throttle orifice i and outer controlled overflow valve j, is connected with P mouth and the D mouth of integrated valve block (4)；D mouth is connected to radiating module, and outer controlled overflow valve j controls mouth and is connected with the A1 mouth of replenishing valve block d；
Described LS feedback module includes a shuttle valve k；A1 mouth and the electricity proportional reversing valve h outlet of shuttle valve k and replenishing valve block d are connected, and shuttle valve k outlet is connected with variable pump (2) through the LS mouth of integrated valve block 4.
A kind of integrated valve block controlled based on load feedback, it is characterised in that also include that main safety valve a, described main safety valve a are connected with P mouth and the T mouth of integrated valve block (4).
A kind of integrated valve block controlled based on load feedback, it is characterised in that replenishing valve block d uses two position and four-way reversing valves, y-function, built-in fixed orifice.
4. the integrated system controlled based on load feedback, including hydraulic oil container (1), variable pump (2), adjustable pollution discharge pipe device (5), brake accumulator (6), brake module (7), radiating module (8) and first guide module (9)；It is characterized in that, also include the integrated valve block controlled based on load feedback described in claim 1-3；Described variable pump (2) oil-in is connected with hydraulic oil container (1), unloading port is connected to hydraulic oil container (1), the P mouth of integrated valve block (4) is connected with the oil-out of variable pump (2), LS mouth is connected with the LS mouth of variable pump (2), A mouth is connected with brake accumulator (6), and B mouth is connected with adjustable pollution discharge pipe device (5), and C mouth connects brake module (7), D mouth connects radiating module (8), and E mouth connects first guide module (9).
A kind of integrated system controlled based on load feedback, it is characterised in that described variable pump (2) uses LS load feedback to control, and LS signal takes from brakes and cooling system.
A kind of integrated system controlled based on load feedback, it is characterised in that described integrated valve block (4) T mouth connects filter (3).
A kind of integrated system controlled based on load feedback, it is characterised in that described brake module (7) includes foot valve and brake.
A kind of integrated system controlled based on load feedback, it is characterised in that radiating module (8) includes fan motor, switching valve.
A kind of integrated system controlled based on load feedback, it is characterised in that first guide module (9) includes that pilot valve and pilot valve are to main distributing valve guide's oil circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610360042.5A CN105822613A (en) | 2016-05-27 | 2016-05-27 | Integrated valve block based on load feedback control and system based on load feedback control |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610360042.5A CN105822613A (en) | 2016-05-27 | 2016-05-27 | Integrated valve block based on load feedback control and system based on load feedback control |
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| CN105822613A true CN105822613A (en) | 2016-08-03 |
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| CN201610360042.5A Pending CN105822613A (en) | 2016-05-27 | 2016-05-27 | Integrated valve block based on load feedback control and system based on load feedback control |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412829A (en) * | 2018-04-09 | 2018-08-17 | 徐州燕大传动与控制技术有限公司 | A kind of separately adjustable load-sensitive formula multi-way valve of inlet and outlet throttling side energy |
| CN108506259A (en) * | 2018-04-09 | 2018-09-07 | 徐州燕大传动与控制技术有限公司 | A kind of load sensing formula multi-way valve of the inlet and outlet independent control of valve post-compensation |
| CN110566333A (en) * | 2019-09-29 | 2019-12-13 | 潍柴动力股份有限公司 | Hydraulic fan system |
| CN112012978A (en) * | 2020-08-27 | 2020-12-01 | 广西柳工机械股份有限公司 | Load-sensitive prefill valve, hydraulic system and loader |
| CN113153853A (en) * | 2021-04-14 | 2021-07-23 | 中信重工机械股份有限公司 | Pipeline control device, valve body and liquid path control system for pile hammer |
| CN113915262A (en) * | 2021-10-27 | 2022-01-11 | 徐工集团工程机械股份有限公司科技分公司 | Novel braking and fan driving system and driving method |
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| CN108412829A (en) * | 2018-04-09 | 2018-08-17 | 徐州燕大传动与控制技术有限公司 | A kind of separately adjustable load-sensitive formula multi-way valve of inlet and outlet throttling side energy |
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| CN110566333A (en) * | 2019-09-29 | 2019-12-13 | 潍柴动力股份有限公司 | Hydraulic fan system |
| CN110566333B (en) * | 2019-09-29 | 2020-11-03 | 潍柴动力股份有限公司 | Hydraulic fan system |
| CN112012978A (en) * | 2020-08-27 | 2020-12-01 | 广西柳工机械股份有限公司 | Load-sensitive prefill valve, hydraulic system and loader |
| CN113153853A (en) * | 2021-04-14 | 2021-07-23 | 中信重工机械股份有限公司 | Pipeline control device, valve body and liquid path control system for pile hammer |
| CN113915262A (en) * | 2021-10-27 | 2022-01-11 | 徐工集团工程机械股份有限公司科技分公司 | Novel braking and fan driving system and driving method |
| CN113915262B (en) * | 2021-10-27 | 2024-04-09 | 徐工集团工程机械股份有限公司科技分公司 | Novel braking and fan driving system and driving method |
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Application publication date: 20160803 |